Update Gridview with an UpdatePanel - Can 28 Different Triggers Call The Same VB.NET Subroutine?

I have a Gridview with 28 linkbuttons which control the filtering of the gridview thru their OnClick events.

I'm trying to use the linkbuttons as Triggers for an Update Panel, and I started with the A linkbutton. In order to get the Gridview to update (and prevent a server error), I had explicitly define a lnkA_Click subroutine (because you have to specify a standard linkbutton event in the Trigger declaration). How can I avoid having to define a lnkB_Click, lnkC_Click etc subroutines for each trigger?

Before trying to convert I had a single subroutine which was associated with the OnClick events with all the linkbuttons, but I wasn't able to use it with the trigger. Any way to get all the triggers to call the same subroutine or do I have to explicitly define one for each trigger :(

I don't mind having to make 28 triggers, I just want to avoid blowing up my code file with 28 subroutines.

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